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Receivables - Components of Finance and Contract Receivables Beyond One Year (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
Jan. 03, 2015
Dec. 28, 2013
Receivables [Abstract]    
Unearned finance charges, finance receivables $ 9.9sna_DeferredDiscountsFinanceChargesAndInterestIncludedInNotesAndLoansReceivableNonCurrent $ 8.9sna_DeferredDiscountsFinanceChargesAndInterestIncludedInNotesAndLoansReceivableNonCurrent
Unearned finance charges, contract receivable $ 19.4sna_DeferredDiscountsFinanceChargesAndInterestIncludedInContractReceivablesNonCurrent $ 17.3sna_DeferredDiscountsFinanceChargesAndInterestIncludedInContractReceivablesNonCurrent